Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 143 for “"Fourier Analysis"”.
-
Fourier Analysis of Wave Equations
… Sciences. In this thesis, I mainly use Fourier analysis and PDE methods to study the solution to an inhomogeneous wave equation on Euclidean spaces. I obtained the existence, uniqueness, and regularity for the solution. In the classical case, the datum involved is required to have up to …
-
Adaptive Fourier Analysis For Unequally-Spaced Time Series Data
Fourier analysis, Walsh-Fourier analysis, and wavelet analysis have often been used in time series analysis. Fourier analysis can be used to detect periodic components that have sinusoidal shape; however, it might be misleading when the periodic components are not sinusoidal. Walsh-Fourier analysis …
-
Fourier analysis on the hypercube, the coefficient problem, and applications
… study some problems that revolve around Fourier analysis. More specifically we focus on the magnitudes of the frequency components. Firstly, we perform a study on the hypercube. It is well known that the Delsarte linear programming bounds provide rich information on the magnitudes of the …
-
Time-scale modification of speech via short-time Fourier analysis
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1989.
-
On certain results of Fourier analysis on non-abelian discrete groups.
… this thesis lie in the intersection of harmonic analysis, functional analysis and operator algebras. Recently, advancement made in the area of quantum information has ignited a wave of interest in the non-commutative aspects of analysis. This, in turn, helped to connect the tools in operator …
-
Fourier Analysis on Semisimple Lie Groups Whose Split Rank Equals One
Made available in DSpace on 2014-12-11T18:23:35Z (GMT). No. of bitstreams: 1 7105267.pdf: 3452552 bytes, checksum: 3a5cc65701277d172992bb55db67a958 (MD5) Previous issue date: 1970
-
Time-scale modification of speech based on short-time Fourier analysis.
Thesis. 1978. Sc.D.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
-
Shape response of pleistocene and recent sediment--Chukchi Sea : a Fourier analysis
Thesis (M.S.)--Michigan State University. Dept. of Geology, 1972
-
Examining Visual Masking in Target Aquisition Uning Two-dimensional Fourier Analysis Techniques
… vision, as well as contemporary digital image analysis techniques, may provide a unified means of classifying the physical properties of targets and backgrounds in real-world scenes. If a unified schema exists or can be derived, the functional relationships between perceptual capabilities and …
-
Application of spatial Fourier analysis on frequency domain horizontal loop electromagnetic measurements, The
Includes bibliographical references.
-
Higher-order Fourier analysis with applications to additive combinatorics and theoretical computer science
Fourier analysis has been used for over one hundred years as a tool to study certain additive patterns. For example, Vinogradov used Fourier-analytic techniques (known in this context as the Hardy-Littlewood circle method) to show that every sufficiently-large odd integer can be written as the sum …
-
Fourier analysis of the laminated facies of the middle Bakken member, Sanish-Parshall field, Mountrail County, North Dakota
Includes bibliographical references (leaves 93-96).
-
Zeros of the Dedekind Zeta-Function
… the Riemann Hypothesis, he used this formula and Fourier analysis to prove an estimate for the proportion of simple zeros of the Riemann zeta-function. We prove a generalization of his formula for the nontrivial zeros of the Dedekind zeta-function of a Galois number field, and use this formula and …
-
Comparison of edge turbulence velocity analysis techniques using Gas Puff Imaging data on Alcator C-Mod
… have been used. One uses temporal and spatial Fourier analysis to obtain wavenumber-frequency spectra, from which a phase velocity is computed [1, 2]. The other is based on time-delay cross-correlation of successive images used to track the motion of discrete emission structures [3, 4]. Several …
-
A new representation for binary or categorical-valued time series data in the frequency domain
The classical Fourier analysis of time series data can be used to detect periodic trends that are of sinusoidal shape. However, this analysis can be misleading when time series trends are not sinusoidal. When the time series process of interest is binary or categorical-valued data, it might be more …
-
Multiplexing of Extrinsic Fabry-Perot Optical Fiber Sensors for Strain Measurements
… spectrum of two Fabry-Perot cavities using Fourier analysis. The goal of this research is to use Fourier analysis to demodulate the spectrum of four multiplexed extrinsic Fabry-Perot fiber interferometers for strain measurements. Comparisons of fiber, foil, and theoretical strains are made. …
-
Pitch Estimation of Musical Signals
… pitch is demonstrated, based on spectrotemporal analysis of the signal. A Fourier analysis algorithm infers perceived pitch from the distance between the harmonics that are present in the signal. A weighted voting technique was developed to assess inter-peak distances, and merge candidate …
-
Novel Segment Deformable Mirror Based Adaptive Attenuator Used In Wavelength Division Multiplexed Optical Communications Network
… communication lines. In this thesis, a method of Fourier analysis of multi-beam interference is developed. It is shown that the total electric field and relative phase delay of each beam form a Fourier transform pair. Thus methods and properties of Fourier analysis are applicable in multi-beam …
-
Caracterização do efeito whitening em polifluoreto de vinilideno (PVDF) por ensaio ultrassônico
… the measurements of sonic velocity, spectral Fourier analysis, second order moment, Hurst analysis (R / S) and dentreded fluctutation analysis (DFA). Optical density measurements were performed to confirm and quantify the whitening effect on PVDF samples. Conventional techniques such as …
Page 1 of 8